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1. On your Lock Screen, press and hold until Customize appears.
2. Tap Customize, then choose Lock Screen.
3. Tap the widget area under the clock and add Lock Words: Word, then Definition.
4. Tap Done. Tap the word at any time to hear it.

You can watch this again in the app under Settings, Show setup guide.

iOS decides exactly when widgets refresh, so a change can arrive a few minutes late, especially in Low Power Mode. Open Lock Words once to refresh it. If it's still stuck, remove the widget and add it again.

Each week runs Monday to Sunday. You get 5 new words every weekday, 25 in all. Get a word right in your evening test and it's collected into your Dictionary. Words you miss wait for the weekend: you get one try at them on Saturday and another on Sunday.

Anything still missing on Sunday night escapes. While your streak is alive, each test includes a second-chance question to win an escaped word back, for two weeks. After that it goes back into the word pool and will turn up again in a future week.

A retry lets you have another go at the day's missed words straight away, instead of waiting for the weekend. You earn your first by doing your test 3 days in a row, and each one after that with 5 days in a row. Using one doesn't affect your streak. The counter next to your streak shows whether you have one.

Open Lock Words, tap the gear, and choose Change word every.

Check your volume. Lock Words plays sound even with the silent switch on. For a better voice, choose one in the app's Voice setting; to download higher-quality voices, go to iOS Settings, Accessibility, Spoken Content, Voices, English.

Make sure reminders are on in the app's settings, and that notifications are allowed in iOS Settings, Notifications, Lock Words. Focus modes can also hold notifications back.

You earn a streak freeze every 7 days, up to 2. If you miss a single day, a freeze is used automatically and your streak carries on. With Lock Words Pro you also get an extra freeze every week and can hold up to 3.

Pro adds four word packs (GCSE & A-level, IELTS Academic, Business and Literary: 400 more words with example sentences), four more colours for the Home Screen and StandBy widget, extra Lock Screen lettering styles, app colours, and a streak freeze every week. Everything in the free version, including the Home Screen widget in Midnight, second chances and retries, stays free.

To cancel, go to iOS Settings, tap your name, then Subscriptions, or use Manage subscription in the app's settings. You keep Pro until the end of the period you've paid for. On a new iPhone, open the app's settings and tap Restore purchases. For refunds, visit reportaproblem.apple.com.

Your progress is stored on your iPhone and moves to a new phone when you restore from an iCloud or computer backup.